StuG's 42 Fastbuds Zkittlez Autoflowers

Week two, girls seem to be OK still, although I have little clue as to how big they should be! May 11th (day 9 since planting sprouted seeds into final pots), I think they are doing OK? Pictures are from May 11th. No nutes given although I did add 0.5ml to 1 litre water, in a sprayer, but have restrained myself from using it yet!! Watering has been using bottled spring water which I leave (5ltr bottles) in the grow tent so it's the same temp as air and substrate. I've pretty much let them dry out between watering. Raised light height a little as I have a small amount of curl on the leaf ends. I also made the fan a little less direct. I feel like I know this has to be light or fan related as the girls are not root-bound and all other parameters are fine. I could well be wrong of course, but I'm determined to learn what the girls want by changing the obvious parameters first before worrying about the big stuff. It's a very mild curl anyhow so I believe it'll be heat/light and fan related. Size-wise, the three are between 75 and 90mm tall and span in 95 to 110mm. If anyone has any thoughts I would love to hear/read them! May 12th I was really pleased to see the progress when I checked on them this morning. I have added a picture. The difference between yesterday and today is pretty clear. Things seem to be OK(?) but what do I know; this is my first grow following reading and learning a little. I've been spraying the leaves before lights out. Is this a good thing? I am aiming to LST the girls so, could anyone recommend when? How many nodes, how tall etc... It would really help me feel confident in the training. May 13th. Pretty amazed at how they're doing. Not that I particularly have anything to compare to experience-wise as these are my first grow. They're kinda praying a little so, doing some reading up on here, I have decided to raise the lights to 20" from 18". Maybe I should go higher? I'll see. Anyhow, temps went up over night as I had closed my grow room window so when I checked this morning they were sitting in 28.6C and 41% humidity. Now more stable at 25C and 47%. One thing I had not realised was how mercurial the temp and humidity would be and how quickly it changes so I need to be more mindful of this. I have added .5ml Biobizz Bio-Grow per 1ltr bottled spring water, although I am still using water only at this time, but in the next couple of days (start of week 3) I will start adding low dose nutes and then foliage spraying them just before lights out and see what that brings. I can always back it off I guess. It's all a bit of educated guesswork, currently, whilst I find my feet with this! May 14th. Decided to hold back on the nutes; Biobizz schedule is seemingly for cuttings and not seedlings so I think I've avoided a potential issue there, given that the Biobizz All-mix soilds have enough nutes to carry the seedlings through almost to flowering of the autos. So, I will remain on giving just bottled spring water until day 21, so, another 1.5 weeks. Then I think I'll add grow and bloom together at the suggested rates. I have some foliar spray mixed up with grow at 0.5ml/L which I think I will use for misting just before lights-out. No picture today... but I will post pics tomorrow instead. May 15th, day 13. Pictures uploaded. The girls are getting really broad, but height only 110mm. Should I raise my lights which are at 19" above top of canopy. They're certainly growing and seem healthy! Still watering (every two days, allowing for an almost dry substrate using the finger/knuckle test in the soil. May 16th, day 14. Started LST with bendy pipe cleaners. Honestly, it was nerve-wracking. I placed anchors at the base and did a simple bend to between 55 and 70 degrees across them. Only thing is, some of the canopy/lower leaves are almost touching the substrate so, should I trim them? I couldn't get up to the top to pull down either and had to go lower, as the plants are very young and squat, seemingly, so not a lot of spacing so I did what I could, anchoring under whatever was free in terms of space. Tomorrow - week 3 of veg starts!